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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

The Pantanal, Brazil, seen here in flood condition, is a critical jaguar range area. The Pantanal, Brazil, seen here in flood condition, is a critical jaguar range area.
Man undergoing a stress test on a treadmill while physician monitors his condition Man undergoing a stress test on a treadmill while physician monitors his condition
A model of anxiety in which stressful events or a changing mental condition can produce unfavorable A model of anxiety in which stressful events or a changing mental condition can produce unfavorable
Transitions from One Stage to Another: Some Possible Triggering Situations of Experiences that may ... Transitions from One Stage to Another: Some Possible Triggering Situations of Experiences that may ...
Who Gets Executed? Gender Bias in Capital Punishment Who Gets Executed? Gender Bias in Capital Punishment
How does slime mold use pulsating movement to search for foods? How does slime mold use pulsating movement to search for foods?
Video: Proteins Defined, Hierarchy & Composition of Cells

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